156799537440 has 288 divisors, whose sum is σ = 618756304320. Its totient is φ = 33082914816.

The previous prime is 156799537421. The next prime is 156799537441. The reversal of 156799537440 is 44735997651.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is not an unprimeable number, because it can be changed into a prime (156799537441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49351 + ... + 562169.

It is an arithmetic number, because the mean of its divisors is an integer number (2148459390).

Almost surely, 2^156799537440 is an apocalyptic number.

156799537440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156799537440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (309378152160).

156799537440 is an abundant number, since it is smaller than the sum of its proper divisors (461956766880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

156799537440 is a wasteful number, since it uses less digits than its factorization.

156799537440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512864 (or 512849 counting only the distinct ones).

The product of its (nonzero) digits is 28576800, while the sum is 60.

The spelling of 156799537440 in words is "one hundred fifty-six billion, seven hundred ninety-nine million, five hundred thirty-seven thousand, four hundred forty".